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NI USB-9215 Series User Guide and Specifications 12 ni.com
Each channel of the NI USB-9215 Series has a terminal or center pin to
which you can connect the positive voltage signal, AI+, and a terminal or
shield to which you can connect the negative voltage signal, AI–. The
NI USB-9215 with screw terminal also has a common terminal, COM, that
is internally connected to the isolated ground reference of the module.
Refer to Table 3 for the terminal assignments of the NI USB-9215 with
screw terminal. Refer to Figure 7 for the pin assignments of the
NI USB-9215A with BNC.
Table 3. Terminal Assignments
Module Terminal Signal
0 AI0+
1 AI0–
2 AI1+
3 AI1–
4 AI2+
5 AI2–
6 AI3+
7 AI3–
8 No Connection
9 Common (COM)
0
1
2
3
4
5
6
7
8
9